Use the latest version of emscripten (#355)

* Update emsdk

* emsdk 1.39

* use emscripten with fastcomp

* Use emcc 1.39.8-fastcomp

... and prepare the switch to LLVM backend

Author: lovasoa

.github/workflows/CI.yml

@@ -9,12 +9,12 @@ jobs:
     - uses: actions/checkout@v1
     - uses: mymindstorm/setup-emsdk@v1
       with:
-        version: '1.38.48'
+        version: '1.39.8-fastcomp'
     - uses: actions/cache@v1
       id: cache
       with:
         path: ~/.emscripten_cache
-        key: emscripten-1.38.48
+        key: emscripten-1.39.8-fastcomp
     - name: make
       run: make
     - name: test

.github/workflows/release.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: mymindstorm/setup-emsdk@v1
         with:
-          version: '1.38.48'
+          version: '1.39.8-fastcomp'
       - name: make
         run: make
       - name: Create Release

Makefile

@@ -32,6 +32,7 @@ CFLAGS = \
 EMFLAGS = \
 	--memory-init-file 0 \
 	-s RESERVED_FUNCTION_POINTERS=64 \
+	-s ALLOW_TABLE_GROWTH=1 \
 	-s EXPORTED_FUNCTIONS=@src/exported_functions.json \
 	-s EXTRA_EXPORTED_RUNTIME_METHODS=@src/exported_runtime_methods.json \
 	-s SINGLE_FILE=0 \
@@ -51,6 +52,8 @@ EMFLAGS_WASM = \
 EMFLAGS_OPTIMIZED= \
 	-s INLINING_LIMIT=50 \
 	-O3 \
+	-flto \
+	--llvm-lto 1 \
 	--closure 1
 
 EMFLAGS_DEBUG = \

src/api.js

@@ -874,6 +874,8 @@ Module["onRuntimeInitialized"] = (function onRuntimeInitialized() {
     @param func [Function] the actual function to be executed.
      */
     Database.prototype["create_function"] = function create_function(name, func) {
+        // TODO : add type arguments for compatibility with the llvm backend
+        // https://emscripten.org/docs/porting/connecting_cpp_and_javascript/Interacting-with-code.html#calling-javascript-functions-as-function-pointers-from-c
         var func_ptr;
         function wrapped_func(cx, argc, argv) {
             var arg;